refactor installation of mesh extenders to use two staging directories
for config file and directory setup.  stage-1 is pre mounting of USB
and stage-2 is for after USB is mounted.
Also make sure USB file systems are cleaned out if they are hanging around.
add zlib package (had libz by mistake which is libzip.* instead of libz.*)
remove unsupported -ls option to find.
unmount file systems before trying to newfs them.
try a bit harder to cleanup /overlay.
disable silly deletion of system binaries.
add expect script to telnet in and set root password on first boot.